COLUMNS - (__________)
elements in the ______ column contain the _____ number of valence electrons and have ______ chemical properties.
valence electrons - the number of electrons in the _______ shell.
ROWS - (______________)
elements in the _________ row have the ________ number of energy levels.
COLUMNS - (GROUPS/FAMILIES)
elements in the SAME column contain the SAME number of valence electrons and have SIMILAR chemical properties.
valence electrons - the number of electrons in the OUTER shell.
ROWS - (PERIODS)
elements in the SAME row have the SAME number of energy levels.
COLUMNS - (VERTICAL GROUPS)
elements in the SAME column contain the SAME number of valence electrons and have SIMILAR chemical properties.
valence electrons - the number of electrons in the OUTERMOST shell.
ROWS - (HORIZONTAL PERIODS)
elements in the SAME row have the SAME number of energy levels.
To fill in the blanks and answer your questions, you need to understand the periodic table of elements.
COLUMNS - (GROUPS)
Elements in the GROUPS column contain the SAME number of valence electrons and have SIMILAR chemical properties.
Valence electrons - the number of electrons in the OUTERMOST shell.
ROWS - (PERIODS)
Elements in the PERIODS row have the SAME number of energy levels.